Pump



April 12,1927.

A1,624,607 l G. W. LEIMAN PUMP Filed' Dec. 1re. 1921 El] y///////////////////l V- cillated by crank shaft.

Patented pr.; 1E, 192?? GEORGE W. I'LEIIlllIAN, OF NEWARK, NEW JERSEY, ASSIGNOR T0 LEIMAN BROS., 0F

NEW YORK, N. Y., A COPARTNERSHIP COMPOS'ED 0F WILLIAM H. LEIMAN, GEORGE 'i W. LEIMAN, GUSTAVE yA. LEIMAN, EDWARD C. LEIMAN, AND JOHN LEIMAN.

PUMP.

Application led December 16, 1921. Serial No. 522,874.

This invention relates .to an improvement the link 13 will hold the piston so that as the 55 l in pumps, and has for its object to provlde a device which is simple, eliicient and durable in construction. L* Another object is to provide a pumphaving a piston hinged and arranged to Ibe os- .Another object is to provide a pump having a piston providedvwith a means whereby the device mayv be ,automatically primed when set inmotion.`

Another object'is to provide certain im.

provements in the form, construction and arrangement of the several parts whereby the above named and other objects may be effectively attained.

A practical embodiment of my invention' is represented in the accompanying drawings, in which- Fig.l 1 represents improved pump.

Flg. 2 represents a front view ofthe same'. Fig.. 3 represents a vertical section taken ia-iside elevation of my lin the plane of the line III- III of Fig. 2,."

.and'

Fig. 4 represents a vertical section vtaken in the plane of the vline l'V-IV of Fig. 1.

The casing of the pump comprises a bodydenoted by 1 having supporting members 2, a hub 3, an inlet 4,fand an outlet 5. he inlet and outlet ports connect with Ia. cylindiical chamber` 6 formed in the body 1, which'chamber is closed by a plate I Screwed to. the body Lby screws 8. A cylindrical plston 9 is located in the chamber 6, the periph- 'eral diameter of which piston is smaller than the interiorv diameter of the chamber 6, so that the piston will be permitted to Jower (not shown).

oscillate therein. .l

Motion is imparte to the'piston by means of a shaft 10 journa ed in the hu'b 3,'whichy ,shaft receives its rotation from a source of The end of thelshaft l0 isreduced eccentrically to form a crank 11 which is journaled in a. bearing 12 in thev The other end of the linkis turnedr at sub-T wstantially an angle of 520l and has an enlarged head 16 which is journaled in a -recess 1.7 in the piston'9. Thus it will ber` seen that -1 wing 18 having an enlargement 19 arrangedA to hinge in a. recess 20 in th'ebody 1'. A spring 21, located at the back of the wing 18 and seated inY a pocket 22, serves to hold the free edge of the wing in contact Withthe outer periphery of the piston.

A passage 23 formed in the body 1, is interposed between the inlet and outlet ports, the function of which is to return any excess liquid pumped to the outlet 5. This passage 23 is closed at "the inlet side Yby a springf-r actuatedrvalve 24 which engages a seat 25 inthe passage 23. The ressure of the valve on its seat may be varie by vmeans of a plug 26 having a screw threaded engagement with a boss 27 on t-he inlet, the movement of which plug increases or diminishes the ten- .sion of the spring on the valve.

This lpiston 9isa1so' provided with a series of holes 28 which during operation become filled with liquid and serve to lubricate the 'walls of the chamber. When the pump is out of operationJ the holes retaina certain amount of liquid which gradually leaks into the chamber 6 and acts as a primer for the pump when set in motion.y

'In operation: As the shaft with its crank' |11* are rotated, the'piston is moved so that its exterior periphery will be caused to contact at some one point with the interior surface of the chambe'r6 and, by reason of the difference in the diameters of they piston and the chamber, and the piston touching 4the walls of the chamber at one point, a pocket 29 will be formed diametrically opposite95` the contact point of the piston and chamber, which pockety is graduated in opposite v directions. ThisA pocket 29 receives and progressively moves with' the piston so that the liquid willi-be forced around in the chamber from the inlet 4 until it registers with the outlet 5 where it will be liberated l andl passed therethrough. In the rotation ofthe shaftand crank, the link holds the piston against rotation on` the crank, and is permittedl a sufficient lateral movement to allow theopiston to lcontact with the interior surface of the chamberat all points. In

the position'of the piston shown in Fig. 4f,

the `liquideis permitted to flow freely intov the pocket 29 and as the piston is oscillated, the upper surface will come into contact with the upper interior surface of the chamber 6 which surfaces are brought together and as the piston is oscillated and advanced the inlet Ltwill be closed and the supply cut od as shown in dotted lines in Fig. 4, at

which position the ocket 29 will be in alinement with the out et 5 and the liquid free to pass therethrough'.

so cause the wing to impinge the periphery of the piston to prevent leakage therethrough. l

It is evident that various changes may be resorted to inthe form, construction and arrangement of the several 'parts without departing from the spirit and scope of my invention; hence, I do not wish to limit lmyself to the specific details herein shownand described kexcept as they may be included in the claims.

What I claim is:

L l. A pump comprising a casing having a. cup shaped cylindrical chamber formed xtherein, inlet and outlet ports for said chamber, arotary shaft provided with a crank, a cylindrical -piston having substantially an uninterrupted working periphery of a slightly smaller diameter than the diameter y of said chamber and mounted on said crank in `position to be oscillated eccentrically in the chamber, a link comprising a short arm and a straight long arm disposedy at right angles to each other, the free end of said short arm being connected to the piston and the long arm linked to the casing between the inlet and outlet ports, a cavity in the wall of the chamber adjadentk. the outlet port for housing said link, whereby the movement of the long arm will Vvopen'and close the outlet port, a spring actuated curved wing hinged in the casi-ng and having its free end arranged to extend into the chamber in position to engage the bottom-of 'the working periphery of ythe piston, and a plate secured to the casin for covering the chamber, piston, wing, lin and cavity.

2. A pump comprising, a casing having a cup shaped cylindrical chamber formed therein, inlet and outlet ports for said chamber, a rotary shaft provided with a crank, a cylindrical piston having substantially an uninterrupted working periphery of a slightly smaller diameter than the diameter of the chamber and mounted on said crank in position to be oscillated eccentrically in the j chamber, said piston being 'f provided lwith a series 'of independent transverse recesses extending through the piston for retaining-certain of the liquid, a link comprising a short arm and a straight long arm dis- ,posed at right angles to each other, thefree end ofvsaidfs'hort arm being connected to the piston and the long arm linked to the casing between the inlet andoutlet ports, a cavity in the casing adjacent theoutlet port fory housing said link, and a plate secured to the casing for covering the chamber, piston, re-

cesses, link and cavity.

In testimony,'that I claim the foregoing as m invention, I have signed myname this 6th ay of December, 1921.

- GEORGE W. LEIMAN. 

